单选题Should we care if over 150 known species of animals have (91) from the earth in the last fifty years? Should we be concerned that there are (92) thousands of species whose very existence is (93) endangered—largely because of our activities? (94) , after all, is the natural end of populations. Species are born, then (95) , and then die. Some live a (96) time, perhaps millions of years; some die more quickly. We have (97) the extinction of many species we know about, and we have undoubtedly sealed the (98) of others. In fact, there are undoubtedly many other species that have lived among us during our time on earth, but that have disappeared as a (n) (99) of our activities without our ever having known they existed. It is hard to explain the rationale of many of us who are concerned about such matters. I have never seen a sea whale, (100) I don't want them to become extinct. Moreover, I felt this way long before I understood anything about how they might be an important part of an ecosystem. Possibly such feelings merely reflect the cultural attitude that it is "nice" to wish other living things well; thus, the attitude is (101) . I feel nice. There are, of course, more rational reasons for (102) the extermination of any species. For one thing, the kind of attitude that encourages or sanctions the destruction of other species is a threat (103) our own wellbeing. If such an attitude exists, we ourselves might (104) victim to it. living things (including us) might be expected to fare better where there is (105) for life. The extinction of other species could also threaten us (106) by simplifying the system of which we are a part or by destroying parts of the ecosystem (107) which we directly rely. For example, if we continue to poison the oceans (108) we are willing to believe only a few bottom dwellers are affected, we might (109) overstep some critical threshold and trigger the wholesale death of plankton, thus finding ourselves without a major (110) of the world's food and with our oxygen supplies dwindling.

单选题As soon as John"s most recent novel had been out of print, it had been mauled by so many critics in New York.

单选题 "What does the middleman do but add to the price of goods in the shops?" Such remarks are aimed at the intermediate operations between manufacturers and final customers. This practice usually attracts a lot of attention from the public and the press and the operation most talked about is what is often called wholesaling. The wholesaler buys goods in large quantities from the manufacturers and sells them in smaller parcels to retailers, and for this service his selling price to the retailer is raised several percent higher. But his job is made more difficult by retail demand not necessarily running level with manufacturers' production. Because he adjusts or regulates the flow of goods by holding stock until required, he frees the manufacturer, to some extent, from the effect on production of changing demand and having to bear the whole risk. The manufacturer can then keep up a steady production flow, and the retailer has no need to hold heavy stocks, who can call on the wholesaler for supplies any time. This wholesale function is like that of a valve in a water pipe. The middleman also bears part of the risk that would otherwise fall on the manufacturer and also the retailer. The wholesaler provides a purely commercial service, for which he is too well rewarded. But the point that is missed by many people is that the wholesaler is not just someone adding to the cost of goods. It is true one could eliminate the wholesaler but one would still be left with his function: that of making sure that goods find their way to the people who want them.

单选题The advantages and disadvantages of Chinese patience are {{U}}what this part will discuss,{{/U}} {{U}}since there are a lot of criticisms on the patience of Chinese nation,{{/U}} {{U}}the positive side of patience will be firstly talked about.{{/U}} A. what this part will discuss, since outsiders often criticize the patience of the Chinese, we'll first discuss the positive side. B. what this part will discuss. But since outsiders often hold a negative attitude toward the Chinese act of patience, it would make more sense to take a look at the positive side of the act before discussing the negative aspect. C. what this part will discuss. Since there are many criticisms on the Chinese's being patient, the positive side of it will be first to be discussed. D. what this part will discuss, since many outsiders often criticize the Chinese for being patient, the negative side of it will be first discussed.

单选题Although Asian countries are generally ______ in social customs than Western countries, there have been several notable examples of women leaders in both China and India. A. consistent B. conservative C. comprehensive D. confidential

单选题The aroused manager ______ merrily for a good four miles to his office an old melogy that he had not recalled for more than ten years. A. wrestled B. wrested C. whistled D. wrinkled

单选题John complained to the bookseller that there were some pages ______ in the dictionary. A. losing B. missing C. dropping D. falling

单选题The jury gave a______of "not guilty".

单选题The wholesaler regulates the flow of goods by ______.

单选题Researchers have discovered that dolphins are able to {{U}}mimic{{/U}} human speech.

单选题Many observers believe that country will remain in state of chaos if it fails to solve its chronic food shortage problem. A. transient B. starving C. continuous D. serial

单选题A century after the German-born scientist formulated his famous theory of relativity in Switzerland, and 50 years after his death on April 18, 1955, Einstein being reclaimed by the country he rejected.

单选题Freud was commonly regarded as great figure, whose name was ______ with psychoanalysis. A. nonaqueous B. synonumous C. prodigious D. proliferous

单选题People whose property is stolen should report to the police. A. had stolen B. is being stolen C. had been stolen D. has been stolen

单选题Leonardo was fined $150 by the magistrate and given a strong warning.

单选题Research should continue on controlled nuclear fusion, but no energy program should be premised on its existence until it has proved practical.

单选题If you carry this arrogant attitude to the conference, you will ______ any supporters you may have at this time. A. delight B. alienate C. defer D. attract

单选题The man we met this morning Ugrows/U many kinds of plants in his garden, most of which are flowers including succulents and cacti.

单选题It is a common knowledge that triangle has three angles, a square has four sides.

单选题David likes country life and has decided to ______ farming. A. go in for B. go back on C. go through with D. go along with